Which part of the brain is the first place (from top to bottom) where all 31 pairs of spinal nerves (on each side) meet? Or if they all start at one place - where is that?
Nominally, the beginning of ...

Sometimes, when I bend over, areas of my skin like my back can suddenly itch quite intensely. Sometimes it may be another part of my body and the pattern seems to be a part of the skin organ that is ...

Last night I laid on my bed and tried to go to sleep with the light off.
I closed my eyes (but hadn't gone to sleep). My younger brother touched the wireless mouse (which had laser) for the laptop. ...

A new study shows strong effects of what should be a negligible CO2 concentration.
The paper "Is CO2 an Indoor Pollutant? Direct Effects of Low-to-Moderate CO2 Concentrations on Human Decision-Making ...

I read an argument that 1-3% of lymph is in peripheral blood.
However, I am not sure if this lymph is about lymphocytes in peripheral blood; not lymph itself.
Lymph gets exchanged between capillaries ...

I often noticed, after (heavy) physical activity like cycling, running, swimming or working an isotonic drink (to recover the electrolyte level) tastes less "salty" compared to when drinking it before ...

In a documentary on fitness I saw it was stated that women can't get big like men because of their low concentration of testosterone. If it is true that women have testosterone, where is it made? Why ...

After class today, the topic of eating one's one fecal matter came up. There was a sharp divide as to how people thought the defecations would change. I realize this is a bit of an odd question but ...

I have a question regarding the description of a subset of peptide hormones, called cyclic hormones. Two examples of cyclic hormones would be somatostatin and melanin-concentrating hormones. I know ...

I read about this idea for a mosquito trap (with a rather tactless name) where the idea seems to be that because the water available for the mosquito eggs is so shallow, they will die somehow or not ...

I am wondering exactly what a-fib is (causes and symptoms).
I would really appreciate having a sample of an EKG with it (because in my limited research, I have found it nearly impossible to find just ...

When a pine cone is wet, it remains closed. However, when it's dry it opens again.
From the perspective of physics or biomechanics, what is the mechanism that allows a pine cone to open and close as ...

I know that viruses and sharp forces can stimulate mast cells by cut or by a virus infecting them and then release histamine. How can blunt force do this and cause inflammation? It doesn't have the ...

Often, after waking up from a night's sleep hard, flaky, pale yellow crystals are deposited around the eyelids (which easily wash off with water).
What are these? Why are they yellow? What are they ...

Ruminants are known for their regurgitation of food; the food goes through the 1st and 2nd stomach chambers, then returns to the oral cavity in cuds. The cuds then come back into the stomach, but this ...

Something I have wondered for a while is why have two different primary defense mediums, ie earwax and mucus, that perform the same function?
As far as I know, mucus and earwax are both part of the ...

I am researching what is triggering the extrasystoles - initial idea from this thread about Which ionic channels of Pacemakers can work in very low frequencies in extrasystole?
I am interested in the ...

At frequency 0-3 Hz.
Like computer processors which can work at low frequencies and controlling under- and overvoltage.
Normal most significant channels are Ca2+ and K+ that are changing.
However, I ...